Key cutting apparatus



July 5, 1932.

H, HANSEN KEY CUTTING vAPE'AR'LUS Filed March 28,1927 7 Sheets-Shea?l 1 mh, s MINiN'N @N SLV July 5, 1932.

H. HANSEN KEY CUTTING APPARATUS Filed March 28. 1927 7 Sheets-Sheet 2 lNx/ ATTORNEY July 5, 1932.

H. HANSEN KEY CUTTING APPARATUS Filed Maron 28. 1927 '7 Sheets-Sheet 5 H. HANSEN KEY CUTTING APPARATUS July 5, 1932.

Filed March 28, 1927 '7 Sheets-Sheet 4 ffm ' ATTRNEY July 5, 1932. A H. HANSEN KEY CUTTING APPARATUS Filed March 28. 1927 7 Sheets-Sheet 5 a ENTOR 245 dm luwu" July 5, 1-932- H. HANSEN 1,866,034

KEY CUTTING APPARATUS l Filed March 28. 1927 7 Sheets-Sheet 6 maf X. lmow July 5, '1932' i 'l H. HANsE-N l 1,866,034 I KEY CUTTING APPARATUS Filed Marh 28, 1927 1 v shgets-sheet 7 ATTORNEY Q HERMAN HANSEN, or NEW provide a Patented -July 5, 1932 lUNITED STATES PATENT oFFlcl-z YORK, N. Y., ASSIGNOR TO FRANCIS KEIN@ SON, INC., A.

CORPORATION OF NEW YORK Application filed March 28,

This inventio-n relates toy apparatus for. cutting keys. One of the objects thereof 1s to tical and erlicient and capable of meeting the various requirements of' practical use inv a highly satisfactory manner. `Another 'object is-to provide a machine of the above nature which is capable of a wide range of use. Another object is to provide a machine of the above nature in which various types of keys may be cuter shaped with rapidity and 'accuracy. Another object is to provide a machine of the above nature which is convenient to operate andl in which adjustments to make various cut-s are accomplished with the greatest ease. Another object is to provide a machine of theabove nature in which the keys to be cut and the master, keys to be copied may be conveniently positioned accurately in their holding devices. Another lobject is to provide a machine of the above nature which is rugged and serviceable'. Another object is to provide a machine of the above nature which is compact in construction. Other objects will be in part obvious or in part pointed out hereinafter.

The invention features of construction, combinations of ele ments, and arrangements of parts as vvill be exemplified in the structure to be hereinafter described and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings in which is shown one ofthe various possible embodiments of this invention,

Figure 1 is a top plan view ofthe apparatus with certain parts shown in lhorizontal section;

Figure l is a front mechanism for operating a clutch, the latch being, shown in operative position;

Figure 2 is a front elevation of the machine;

Figure i3 shows .diagrammatically a key blank positionedfin relation to certain parts` of the machine;

Figure 4 shows certain parts of the apparatusin relation to a master key or guide key cutting machine which is pracaccordingly consists in the;

elevation of a latch.

1927. seria1 No. 178,953.

lky which is to be fouowed in e tang the key blank of Figure 3; y

"Figure-eis a partial end elevation showin parts ofthe machine as viewed from the rle t 'of Figure 2;

Fi ure 6 is a view similar to Figure 5 but showing the parts in a different position; v

O'ure 7 1s a vertical sectional view 1n en- Fi lar eed detail of a key holding device which is s own in Figures 5 and; Figure 8 is a view si 'lar showing the parts of the device in adif'ferent position; f r

Figure 9 is a front elevation of parts viewed from theright'hand side of Figure 8; Figure 10 is Va detached detail view of parts of the driving apparatus; v

Figure 11 is a vertical sectionalview taken along the line 11-11 of Figure 10; Figure 12 is a vertical sectional view taken along the yline 12-12 of Figure 1;

Figure 13 is a fragmentary front eleva-- tional view of a clutchmechanism taken as seen along the line 18-13of Figure 1; Fi ure 14 is a diagrammatic vlewillustratg tie cuttingof anotch in the side edge of the bit of a barrel key;

Fi e 15 is a diagrammaticview illustrating t e cutting of anotch ina flat key;

Figure 16 shows the manner in which the key of Figure 15 's held for the cutting operation;

Figure 17 is an end elevation of the machine viewed from the right-end of Figure 1;

Figure `18 is a vertical section taken along the line 18-18 of Figure 1; i Figure 19 is a vertical section taken along the line 19e-19 of Figure 18; A

Figure 20 is a view 'similar to Figure 19 but showing the parts in a different position; Figure 21 is a view similar to the'left-hand ortion of Figure .18 and showing the parts 1n a different position;

to Figure 7 but' f Figure,22 is a viw similar toj-theleft-hand j portion of Figure 17. with the key drawn back from the tool and with certain parts omitted` to permit a clearer showing;

' Fig seen .substantially along the line v23--23 of Figure 18 showing the parts in larger detail;

re 23`isan enlarged sectional view as Figure 24 is a front elevation of one of the parts shown in Figure 23;

Figure 25 is a perspective view of portions of a key clamping device shown in Figure 23;

Figure 26 shows the same key clamping device 1n a position other than that assumed thereby in Figure 23;

Figures 27, 28 and 29 are diagrammatic views illustrating the cutting of a notch in the front edge of the bit of a key blank of the barrel type;

Figure 30 is a side elevation of the bit portion of a barrel key, and

Figure 31 is an end view of the key shown in Figure 30.

Similar reference characters refer to similar parts throughout the several views of the drawings.

Referring now to the drawings in detail' and irst to Figure 1, this key cutting apparatus is shown as being mounted upon a suitable platform or base 2O and driven by an electric motor 21. It will be understood, of course, that any other suitable form of power drive may be substituted for the motor. Upon the armature shaft of the motor 21 is shown a gear 22 which meshes with a gear 23 loosely rotating upon a shaft 24. This gear 23 meshes with a gear 25 which is xed upon a shaft 26, for example, by means of a set screw 27. A set screw 23a threaded into the hub of the gear 23 engages with a circumferential groove in the surface of the shaft 24 and prevents longitudinal movement of the gear 23 along the shaft 24 while permitting relative rotation of these parts. The shaft 24 is rotatably supported in bearing supports 28 and -29 and may be connected in driving relation with the gear 23 or disconnected therefromV by means of a clutch member 30. This member 30 is slidable longitudinally of the shaft 24 and splined thereto by a key 31 and hasA a member 30a which forms the male member of a clutch of which thevhub of the ear 23, suitably recessed as at 236, is the emale part. In the position shown in the drawings the clutch 30 is operative toconnect the shaft 24 in driving relation with the gear 23. In order to disconnect the drive of the shaft 24 the member 30 is slid back along the shaft', thus disengaging member 30a'l from the recessed hub, and is slid against a fixed collar 32. For convenient operation of this clutch there is provided a. lever 32a which is pivoted at its lower end to the base 20 and which is operated as will be made clear hereinafter. l

The shaft 24 has fixed thereon a gear 33 meshing with a gear 34 which is fixed upon a shaft 35 supported in bearings 36 and 37. The shaft 35 38 which meshes with a gear 39, this latter gear being xed upon a shaft 40. The functions of these parts just described will later has fixed thereon a second gear tinually connected in driving relation with the motor 21 and that the shaft 35 `may be connected ordisconnected lfrom the drive of the motor as desired through the clutch mechanism 30. It will be noted that this driving mechanism just described makes for a ver compact and simple arrangement of the various parts.

Considering now the shaft 26, this shaft is rotatably supported in bearing posts 41 and 42, and at its left-hand end carries a circular cutting tool 43.' This tool is held in place upon the reduced end portion 26a of the shaft and up against a shoulder 266 by means'of a nut 44, and is thus removable and replaceable by other tools by simply removing the nut. The cutting tool 43 is rapidly rotated byits drive from the` motor 21.

At its portion adjacent the bearing 41, the shaft 26 has formed thereon a thread or worm 45 with which engages a worm wheel 46. Referring to Figures 10 and 11, these parts are shown more in detail. `The worm wheel 46 is fixed upon a shaft 47 which extends downwardly and has formed thereon a thread or worm 48 meshing with a worm wheel 49. Preferably the shaft 47 is encased in a casing 50 having therein an opening for the entrance of the worm wheel 49, the casing 50 forming a support and thrust bearing for the shaft. As best shown in Figure 11, the worm wheel 49 is mounted to rotate freely on a shaft 53 which is .rotatably supported at 'its right-hand end in the post 41. On the left-hand face of this worm Wheel is a clutch member 51 which may be formedv integral with the worm wheel. A clutch inember 52 is 'adapted to mate with the clutch member 51. This clutch member 52 slidably mounted upon the shaft 53 and splined thereto by a suitable key 54. Thus the shaft 53 is adapted to be slowly rotated through the worm drive from the shaft 26. The drive of the shaft 53 may be thrown in or out by means of the clutch 521-51.

The shaft 53 carries thereon a cylinder 55 having in its cylindrical outer surface a cam groove 56 (Figure 1). As shown in Figures 1 and 2 and also in Figure 5, extending between and supported by a pair of uprights 57 and 58 conveniently positioned to the front of posts 41 and 42 respectively are a pair of horizontal rods 59 and 60. Slidably mounted upon these rodsl is a member 61 which carries upon its side facing the cam 55 a roller 62. This roller 62 (see Fig. 1) engages 'with the slot 56 in the surface of the cam 55, the cam slot being shaped to move the member 61 back and forth along the supporting rods 59 and 60. In the position shown in the drawings, the member 61 is at its eX- treme left-hand position. The groove 56 extends all the way around the cam 55 and is shaft 26 is conf 'the member 61 ,to its initial position. f

shaped to imparta uniform movement to the member 61. Starting from the position shown in the drawings lit will be seen that a complete rotation of the cam 55 will move to the right and back again Also mounted upon the supporting rods 59 Y and 60 to the right of the member61 is a second slidable member 63 'which is shown in detail in Figure 10. This member 63 is provided witl a pair of inwardly projecting arms 64 and 65 which engage with a circumferential groove 66 formed in `the slidable clutch As best shown inFigure 2, there are provided about the supporting rods 59 and 60 ,at

the right of the member 63 a pair of compression springs 67 and .68 which continually urge the member 63 to the left and hence urge-the clutch member 52 toward the position of disengagement. The member .63 carries a roller. 69 which is adapted to engage the right-hand end surface of the cam 55 adjacent the edge thereof. Thisengagement of the cam 55 with the roller 6 9 is adapted tohold the member` 63 to the righ't against the action of the springs 67 and 68 and thus hold the clutch 4member 52in position of engagement with member 51 at all times except when the cam is in such position of its rotation that it has moved the member61 to its extreme leftposL tion, as shown in the drawings. At this point a recess 70 formed in the end surface of the cam 55 comes opposite the roller 69 and permits the member 63 to move tothe lett under "'"the action of the springs 67 Land 68, disengaging the clutch member 52 frommemberl 5 V.

.As is best shownin Figure 1, there is provided above the member 63 a horizontal arm `200 which is pivoted about a vertical screw opening.

the base 20, thus 2-01 in the top of the upright 57. This arm is urged to swing outwardly toward the front of the machine by a leaf spring 202. As shown in Figure 1a and -also inFigure 2, against the front surface of the member 63 is positioned a member 203 which is fastened thereto by a screw 204. Adj acentits left-hand end this member 203 is providedk with a downwardly projecting lug 205 which enters an (see Figure 10) in the surface of forming in effect a pivot about which the member 203 may swing. The right-hand end of the member 203 has an arm 206n which'V extends outwardly toward the front of the machine' and is provided at its outer end with a button 207. By depreing the upright 57.

In the position p `the springs 67 `and 68.

`clutch members engaged,

the button 207, the upper portion 208'at the` member 63 and Y through a slot in the member 203 and enters 1, the front edge of the arm 200. has therein a notch 210 which is adapted to receive and hold the u' per end ortion 208 of the member 203. lso, the left-hand end of the arm 200 is inclinedor beveled as shown at 211. hIn the osition of the parts shown in the drawing, t e part 208 of the member 203 is in engagement with the notch 210.` As will ings, this notch is so positioned that it holds the 4member 203 and the member 63 there- As shown in Figure with in such position that the roller 69 is held to the right and out of engagement'with the recess 70 of the cam 55, against the/action of AThe clutch member 52 is thus held in engagementwith member 51, the arm 200 with its notch 210v'serving as a latch which holds the clutch members 1n engagement against the action of the'springs tending to disengage the clutch members.

n In the operation of this apparatus, the initial positions of the cam I and of the slid` ing member 61 are as shown in the drawings, the member 61 `being at its extreme left position. In such position of the parts, the recess in the cam 55 to the roller 69, but the roller 69 is held to the right bythe latch 200 against the action of the springs 67 and 68, whereby the clutch members are held -in engagement and the cam 55 is rotated. As the cam 55 rotates, the recess 70 moves out of registry with the roller 69 and the member 61 moves to the right. As the member 61 nears the end of its movement toward the right, the .projecting pm 61a thereon (Figure 1) strikes the beveled end 211 of the latch 200 and swings the late li inwardly about the pivot screw 201. This releases the part 208 of the member 203 from the latch, and the roller 69 may now move to the left under the urge of the springs 67 and 68 ;v however, at this point, the recess 70 of the cam has moved out of registry with the roller'69 and the end surface of the cam holds the member 63 to the right and holds the be seenfrom the drawis positioned opposite he drive of thel .so A

cam now continuing wlthoutthe assistance of y tho latch 200. l

As showni Figure la, connectsvthe member. 203 with the member 63 is threaded into the member 63`and passesopening in the member. Y 212 (Figure 2) bearing the base I2O 'continuall through an enlarged 203. A leaf sprin against the to o urges the mem er 203 to swing', to the le t the screw 204 which iso the upper portion 208 of the member 203 to the left be ond the edge of the notch 210, as shownin Fyigure 1a. Now as the member 61 moves back toward the left under the drive of the cam 55, moving the pin 61a out of eny gagement with the beveled end 211 of the latch, the latch 200 cannot swing back to let the part 208 enter into the recess 210. The member 61 continues its movement to the left with the end surface of the cam 55 alone holding the clutch members 51'and 52 in engagement against the action of the springs 67 and 68. When the cam has completed one rotation, moving the member 61 to the right and then back to the left to its initial position, the recess again comes into registry with the roller 69, the member 63 moves to the left and with it one of the clutch members Fig. 11) and the clutch is `disengaged to interrupt the drive of the cam. Thus, the member 61 will move -to the right and back again to its initial position and stop.

The mechanism stops with the roller 69 resting in the recess 70, with the clutch member 52 disengaged from member 51 and with the par-t 208 of the member 203 moved to the left and out of registry with therecess 210 in the latch member 200. In order to again start the drive of the cam 55 and of the/member 61, it is necessary simply to depress the button 207. This action swings the member 203 to the'right, member 203 moving the member 63 through which the clutch member 52 is moved into engagement with the clutch member 51, and then also the latch 200 sna s into position to hold the clutch engaged, the swinging of member 203 bringing the part 208 thereof in line with the recess 210 of the latch 200.. The member 61 then starts its movement to the right and the action described above is repeated, the member 61 moving to the right, then back to itsvinitial position and stopping.

Mounted in front of the cutter 43 is a carriage 73 which is slidably supported by a pair of legs 74 and 75 (see Fig. 2) upon a longitudinal shaft or rod 76 which is mounted within the base 20, the legs 74 and projecting downwardly through a` slot 162 in the top of the base. This carriage 73 is thus movable longitudinally in a direction substantially parallel to the direction of movement of the member 61, and it is provided with means for supporting a key blank to be operated upon by the cutter 43 and with (see.

means for supporting a master key or key. Keys to be cut by the cutter 43 are of the type known as Yale keys or cylinder keys and 1n Figures 3 and 4 are illustrated a. 'key blank 77 and a master key or guide key 78 of this type.

produce in the key blank 77 the shape of the key 78.

As best shown in Figures 5 and 6, the key blank 77 to be cut is c amped in a clamping guide The purpose of the cutting operation by the cutter 43 is accurately to re.

device mounted'upon the carriage 73 and indicated generally by the numeral 79; the master key or guide key 7 8 is clamped upon the carriage 73 1n a clamping device indicated generally by the numeral 81. The key blank 77 is clamped in the device 79 with its edge 7 7a facing toward the cutter 43, and the gui e key 78 is clamped in position with its edge- 78a facing a guide 83. The carriage 73 is capable of swinging, about the axis of shaft 76, toward and away from the cutter 43, and

The guide 83 is seen in Figure 1 and also in F iguresf5 andl 6. Its mounting is not shown in detail herein since this feature is not of importance as relating to the present invention, but preferably the guide is mounted as shown in my co-pending application Serial No. 88,729, filed February 17, 1926, and is adjustable in vposition and interchangeable with other guides as described therein.

The carriage 73 carrying the key blank 77 and the guide key 78 is adapted to be moved back and forth upon the supporting shaft 76 by connection with the member 61 which is driven from the cam 55 as before described. The driving connection between the carriage 73 and the member 61 preferably comprises an arm 91 (shown in Figures 1, 2 and 12), which is mounted upon the right-hand end of the carriage 73 and engages a recess 616 (see Fig. 12) in the surface of the member 61.

By swinging the carriage 73 about its supporting shaft 76 and in a direction away from the cutter 43 against the action of the spring 84, the arm 91 is moved out of the recess 615 and henceout of engagement with the member 61 and the driving connection between the member 61 and the carriage 73 is thus broken.

Referring to Figure 12, the arm 91 is shown in detail. It is slidably mounted upon the side of the carriage 73 by a screw 213 passing through a slot 214 in the arm. In the upper edge of the arm are two notches 215 and 216,

and projecting from the side of the carriage -is a pin 217 which is adapted to coact with i thumb these notches. A suitable spring '218 fastened to a pin 219 on thecarriage bears upwardly agalnst the arm 91 and urges the arm the screw 213 against the action of the spring 218.

In the position shown in the drawings, the notch 215 is in engagement with the pin 217 In this position the rear end of the arm 91 is in driving engagement with the sliding member 61 so that the carriage 73 partakes of the movement of the member 61. By depressing the flange 220 and sliding the arm 91 to the left, as viewed in Figure 12, the notch 216 is moved into engagement with thepin 217. This moves the arm 91 so that the end thereof does not engage the-member 61. By now disconnecting' the spring 84 from the pin 61a, the carriage may be moved manually back and forth along its supporting rod 76.

Thus, when it is desired to cut keys without the aid of the automatic feed feature, the

drive-of the carriage is readily disconnected and the carriage may thereupon be manipulated manually.

As shown in Figures-1 and 2, there is provided at the left-hand end of the apparatus an arm 92which is pivotedat its lower portion upon a supporting shaft or rod 93 rigidly sup orted upon the base 20. -This Varm 92 an the parts with which it coacts are shown in detail in Figures 5 and 6, the arm being shown in operative position in Figure 5 and in inoperative position in Figure 6. This arm is provided in its upper edge with a sloping slot 94 which is adapted to en age a pin or projecting lug 95 on the side o the carriage 3. When the arm'is inoperative, as shown in Figure 6, it is swung downwardly and' rests at its outer end upon the surface of the base20. When moved u wardly to the position shown in Figure 5 t e slot 94 engages with the pin 95, and the carriage 7 3 when swung outwardly about its supporting shaft 76 and away from the cutter 43 is thereby locked in the outward position shown 1n Figure 5, against the action of the spring In addition to thus moving the carriage 73 away from the cutter and holding the carriage in this position, the arm 92 is provided withn pair ofprojecting lugs 96 and 97 which serve as guides to aid in properly positioning the key blank 77 and the guide key 78 in their respective clamping devices 79 and 81, so

l in operative relation to the key blank 77 fand the guide key 78 with which they respectvely coact. It will be seen that these two lugs provide shoulder stops or abutments `against which the shoulders 776 and 7 8b of the key blank and guide key may be moved.

The clampin devices 79 and 81A are preferably substantia ly identical so that one only need be described in detail.- In` Figures 7,

' 8 and 9 there are shown enlarged detail views ofone of these clamps. The clamp comprises a lower member 221 which is supported upon the carriage 73 and preferab y interfitted therewith, as shown at 222, and an upper y.

member 223. Between the two aw portions 22M and 223a of these two mem ers the key,

such as 77, is adapted to be clamdped. The

part 221 has a the vkey clam shoulder4 of t ehoulder 224 exten ng along clamping device adapted to aline and hold the key blank is exactly parallel to the corresponding shoulder of thev clamping device adapted to hold the guide key -or master key. Thus, when the keys are positioned in the clamping devices with their rear edges firmly up against these shoulders 224, the key bl ank and the master key are in proper parallel relation and the cutting of the key blank will be done accurately.

Threaded into the carriage 73 is a post 225 which extends upwardly through the part 221 and through an enlarged opening in the part 223 and .which is provided at its 'upper en d with a thumb nut 226. By threading the thumb nut downwardly vralong the post 225., the member 223 'is forced downwardly toward the member 221 to clamp the key.

ing surface thereof, and this On the upper surface of the upper part' 221 y Ais formed a.` longitudinal ridge 227 vwhich is referably wedge-shaped as shown. In the ower surface of the member 223 is formed a longitudinally extending groove 228 which is parallel to the ridge 227 and which is adapted to mate substantially therewith. At the side opposite the clamping portions 221a and 223a the members 221-and 223 are connected, preferably bya leaf spring 229. This spring is secured to the lower member 221 as by a extending between a pair of spaced flanges 232 resting on `the upper surface of the part 223. After passing over the part 231, the end portion of the spring 229 curves downwardly to the left, as viewed in Figures 7 and 8, entering a Vslot 233 in the part 223 and bearing against a curved surface 234 thereof. This spring, in addition to detachably connecting the parts 221 and 223, thus urges the part 223 to theleft, and when the-thumb nut 226 is loosened, the member 223 assumes a position such as that shown in Fi re 7 relative to the memberl221. When t e thumb vscrew 230 and passes upwardly over a pin 231 nut is loosened, the spring urges the member the member 223 through which the post 225 passes. i .y

When the key such as 77 is inserted, the parts are in a position such as that shown -1n Figure 7, .it being noted that the spring 229 has moved the jaw member 223a beyond (to the left as seen in Fig. 7) the coacting jaw member 221a and that the lower portions of the inclined surface 228l has ridden up along the inclined surface 227 a of the ridge v227. Now when the thumb nut 226 is threaded downwardly. to clamp the key, the surface 227a of the ridge 227 coacting with the ,surface 228a of the groove 228 causes a twofold movement of the member 223 relative to the member 221 g these coacting surfaces effect a drawing of the member 223 to the right (as viewedin Figs. 7 and 8) and a movement of the clamping part or jaw member 22311 toward the shoulder` 224. As this action takes place, the part 223e has achieved a grip upon the surface of the key 77 and the result is.

that the key is moved inwardly (to the right) as the clamping device is tightened up andV is by this inward movement drawn firmly against the shoulder 224:J when the nut 226 has been threaded down to its final clamping position, as shown in Figure 8.

` The construction just described is of dis-y tinct advantage in making certain that the key will be always clamped in the exactly correct position and in always ensuring the` proper relation between the the key blank 'and the positioning of the ositioning of guide key. The keys are clamped in position .accurately and dependably with the greatest v ease and the convenience afforded results in a very substantial saving in time, the abovedescribed action' avoiding the necessity of `exercising care and skill in putting the key blank and master key in their respective clamping devices and also avoiding the necessity of correcting inaccuracies in posi- --tioning of the key or key blank.

, When the arm 92 is moved upwardly (Fig. 5) to operative position, thereby moving the carriage 73 away from the cutter L13,`it will be seen that the arm 91 moves out of recess 61h and its driving connection with the member 6l is interrupted. Therefore the drive of the carriage 73 cannot be started until the arm 92 moved downwardly into inoperative position. The apparatus is thus safeguarded, and damage to the lugs 96 and 97 or disrupting of the clamped keys which might occur by Y v the left and in the position shown in Figure 2,' when the leg 74 can clear and by-pass the end 920 of member 926. When the /carriage moves to the right the leg 74 thereof comes opposite the flange 926 and, if itl is now attempted to raise the armI 92, the web 926 'swinging therewith'strikes the le 74 and prevents the army from beinglifte Thus, the gaging means which this arm 92 provides cannot be utilized except when the carriage 73 is at its extreme left-hand position. This insures that when a key is adjusted into the clamping device with the aid of the gaging arm 92, the carriage is in proper position to properly coact with the gaging arm.

In the operation of cutting a key blank ofthe cylinder type such as the key blank 77 shown in Figure 3, the parts are1 initially positioned asfshown in Figures 1 and 2 of the drawings. The cutter 13is rapidly rotated by its driving connection with the motor 2l.

The cam 55 is soI positioned that the member 61 and hence the carriage 73 in driving connection therewith are at their extreme left positions. The recess 70 in the cam 55 is in registry with the roller 69onthe member 63 and the clutch member y52 is lthus held in position of disengagement ifrom member 51. The operator draws the carriage 73 (see Figure 5) outwardly and movesthe arm 92 upwardly (leg 74, as will be clear from Figure 2, clearing the end portion 92 of flange member 92h), arm 92 coacting with pin 95 locking the carriage in this outwardly drawn position against the action of the spring 84. This outward movement of carriage 73 also disengages arm 91 from' member 6l (see Figure 5). The operator then clamps the uide key 78 in the clamping device81. wit the shoulder 786 thereof properly up against the lug 97, and clamps the key blank 77 in the clamping device 79 with the shoulder 776 properly 'up against the lug 96. In each instance, the inward movement of the upper clamping jaw 222n (see Figures 7 and 8) causes an inward drawing of the key or key blank to solidly aline the back edge of the latter against the shoulder 224. The arm 92 is then moved downwardly to inoperative position, permitting the carriage 73 to move inwardly, the arm 91 thereon entering into driving engagement with the member 6l.`

The operator then depresses the button 207 .thereby swinging the member 203 in clockwise direction about the pivot 205 (see Figure 2) and this movement of the member 203 moves the member 63 in a direction-to the right, as viewed in Figures 1 and 2, thereby moving clutch member 52 (see Figure 11il into engagement with clutch member 51 and thus setting the cam 55 in rotation; the abovementioned movement'of the member 203 also causes the part 208 thereof to be brought into registry with the notch 210 of the spring latch 200, the latter` springing into locking position, as shown in Figurev .1.

The inter-engagement of the two clutch members sets the cam 55 in rotation and thus starts the movement of the carriage 73 to the right, as viewedin Figures 1 and 2. The initial movement of rotation of the" .cam 55 moves the recess 70 of the cam 55 out of juxtaposed relation to the roller 69. As soon as the carriage reaches the end of its movement in right-hand direction pin 61a engages with the beveled portion 211 of the latch 200 and continued movement of the carriage an hence of the pin 61a to the right swings the latch 200 in clockwise direction, as viewed in Figure 1, and thus disengagesthe latch 200 from thepart 208 of the member 203, the parts assuming the positionshown in Figure 1 from which it will be noted that the -cam roller 69 moves slightly to the left and into engagement with the end face of the camv 5'5 thereby continuing to hold the clutch members in inter-engagement. The carriage-73 then moves to the left and upon substantially completing its traverse in left-hard direction the rotation of the cam 55 brings the recess 70 again into juxtaposed relation to the roller 69, permitting the latter to move to the left, as viewed in Figure 2, under the urge of the Springs 67 and 68, and thus disengaging clutch member 52 from member 51; the rotation of the cam 55 and the movement of the carriage 73 are thus halted, it being noted that the parts are-left in such a position ing urged inwardly by the spring 84.

. might be termed that a subsequent actuation of the button 207 (see Figurel?) re-commencesthe above-described cycle.

During this movement of the carriage the surface 7 8a of the guide key 78 moves along the edge 83a of the guide 83, the carria e becarriage moves along, it swings inwardly and outwardly about its supporting shaft 76 in accordance with the depth of the depressions in the surface or edge of the guide key 78. The key blank 77 partakes of this in and out movement as it moves across the cutter 43. The shape of the surface 78a of the guide key isv thus accurately-reproduced in the edge 77a of the'key blank.4 During the operation, the key blank receives two cuts, moving relative to the cutter to the right and then back again to its initial position. As the key blank'moves to the right it is given what a roughing cut by cutter 43 and as it moves back to the left it is given what might be termed a finishing cut'. The shape of the guide key 78 is thus faithfully and dependably reproduced in the key blank sthe` 77 as well as expeditiously and with the greatest accuracy.

It may here be pointed out that the traversing movement of the ,carriage 73 as above described may be interrupted at will and at any point in the'path oftravel ofthe carriage;

this may 'be accomplished by manually swing-f ing the carriage 7 3 in'a direction away from the apparatus, thereby moving the member 91 out of the recess 61b in the member 61.

Referring now again to Figure 1, as was earlier described herein, the shaft 40 (shown at the right-hand portion of Figure 1)' is driven through a train of gearing from'the motor 21 and its drive may bev thrown in or out through the medium of the clutch-30. This shaft 40 is supported in suitable bear- 'ing supports 100 and 101 and at its righthand end carries a. circular cutting tool 102 which is clamped in position upon the reduced end portion of the shaft and against a shoulder 103, by means of a nut 104. The cutter 102 may thus be rotatedv at high speed by the shaft 4.0 and is removable bymeans of the nut 104 for the purpose of substituting. other cutting tools. This cutter 102 is adapted for cutting what are known as sideward notches in keys of the barrel type. In Figures 30 and 31 there is shown a key 108 of this type comprising what are known as the barrel portion 105 and the bit portion 10G 7 therein a sideward notch or groove 10 107, a key such as 108 is supported beneath the cutter 102, as is shown in Figure 17, by a suitable clamping device indicated generally by the numeral 109. This clamping device and its mounting are not shown in detail herein; preferably Vthe construction, mounting and adjustments of the clamping arrangement 109 are the same as the corresponding parts of the machine described in my copending application hereinbefore mentioned.

Referring again to Figure'l of the drawlngs, between rthe two bearingy supports or uprights 100 and 101 is rotatably supported a member in the nature of a turret or spider- Y mounted about the shaft 40, the shaft 40 passing therethrough as shown in Figure 1. As also shown in this figure, the member 121 is positioned so that the cutting tool123 carried by the arm 121?) is in position to operate upon a key blank clamped in the clamping device 122. .The arm 121e, spaced 180 from the n order to cut this sideward notch Figure 1. Each of these The clutch member is 123?) thereof by means of a nut 125. The

shaft or spindle 123e is rotatably supported in the arm 121?) and at its left-hand end is pin 126 passing therethrough and secured therein.V Shoulder 123?) at one end and a nut 165 at the other end prevent longitudinal movement of the shaft 123a relative to its bearing.

When the member 121 is in the position shown in Figure 1,"the left-hand end of the spindle 123e is in position to coact with a clutch collar 127 which is mounted upon theV right-hand end of the shaft 35. The collar `127 is splined to the shaft 35 so that it rotates therewith and is slidable along the end portion of the shaft 35 shownin the drawing the collar 127 is moved to the left. When the collar 127 is moved to the right it embracesthe end portion of the spindle 123erl and the projecting ends of the pin 126 enter a diametrical slot128 of the collar. This slot is suitably notched as indicated so that when the collar is moved to embrace the end portion of the spindle 123e and the parts are Athen rotated, a secure driving connectionv is had. The clutch collar 127 with the coact-ing pin 126 thus. forms a detachable driving connection between the shaft 35 and the spindle 123e carrying the cutting tool 123. When the collar 127 is moved into position of driving engagement the cutter 123 is rapidly rotated directly from the shaft 35.

Referring now to Figure 13, there is shown a preferred means for shifting the clutchcollar 127 along the shaft 35 and into and out of engagement with the spindle 123m or with f the other spindles mounted in the spider 121.

ripheral groove '127a which is embraced by an upstanding lever 236. This lever 236 is pivoted at its lower end to the surface of the frame or base 20, for example by means of a suitable bracket 237. The clutch member may be manipulated very conveniently by simply moving the projecting upper end of the lever 236. Tt may be here mentioned that the lever 23a (Figure 1 which is provided for shifting the clutch 30, is preferably constructed and operated in the same man-- The cutting tool 124is fixed upon a shaft or spindle 129 which is rotatably carried in the arm 121@ and which-is provided with means identical with those just described in connection with the spindle 123er for driving connection with the clutch collar 127. The cutting tool 124e may be brought into position to operate upon the key blank held in toward and away from the spindle 123a. In the position' provided with a pethe clamping device 122 by simply rotating the member 121 until the spindle 129 comes opposite the collar 127. The drive of the cutter 124 may then be connected as was the drive of the cutter 123.

Referring to Figure 2 ofthe drawings, the remaining two arms 1210 and 121d of the member 121 are shown. The arm 1210 is provided with a spindle130 shown as carrying a cutting tool 131, and the arm 121d is provided with a spindle 132. These spindles 130 and 132 are provided with means identical with that of the spindles 123a and 129 for forming a driving connection with. the

collar 127 on the shaft 35. The carried by the spindles 1 23a, arek removable and replaceable by other cutting tools by simply removing the nuts 125 cutting tools which hold the respective cutting tools in place upon the spindles. y Referring again to Figure 1, the rightvhand end of each of the spindles 123e, 129,

130 and 132 is provided with an axial recess 166 which is adapted to receive a pin 133. This pin is slidably supported in the upright 101 and on the side of the axis of the mem-` upon the key blank. The restraining pin coacts with the spindle which is diametrically opposite the spindle carrying the cutting tool which is performing its work. Thus, as shown in Figure 1, the pin 133 is in registry with the recessl 166 of the spindle 129 while the spindle 123a is in operative position.

It willthus be seen that a variety of sizes or shapes of cutting tools maybe carried by the member 121-)and that each of these tools is in readiness to be brought instantly into position to be driven and to operate vupon the key blank clamped in the clamping device is operating upon a key' 122. When a tool blank the tool is dependably driven directly from the shaft 35 and, moreover, the turret member or spider 121 is dependably held in the position desired.

Considering now more particularly the mounting of the clamping device 122, this is mounted upon a carriage 136 which is shown in Figure 2 and more in detail in Figures 17 and 22. The carriage 136 is slidable longitudinally upon a shaft-..139 which it embraces at its lower end. The shaft 139 is mounted in the base 20 beneath the upper surface thereof and the carriage projects downwardly through a slot 168 in the base 129, 130 and 132 i back and forth-along the shaft. 139 in a dil rectionparallel to the axes of rotation of theA -ter 123 is employed.

cutting tools carried by the spider 121 and, moreover, the carriage' may be swung about the axis of the shaft 139-toward and away from the cutting tool.

Referring now to Figure 17 and also to Figure 22, the carriage 136l is more clearly shown, It comprises in eifect two portions which are rigidly joined together, one; portion carrying the clamping device 122 in which is held the key to be cut, andthe other portion, preferably inclined outwardly at an carrying a. Segond clamping device 142 in which is' supported the guide I angle as shown,

key or master key the shape of which is to be reproduced in the key blank carried by the device 122.. In Figure 1 7 the carriage is shown in operative positionadvanced toward the cutting tool 123, and in Figure 22the carriage is shown drawn back and in inoper-I ative position. A master key or guide key 144 of thebarreltype is shown clamped in the clamping device 142 and a key blank 141 also of the barrel type is shown clamped in the clamping device 122 in readiness to be operated upon by spider 121. As will be understood, this apparatus being described is adapted for cutting the key blank-141 to produce therein an exact duplicate of the guide key 144.

Each of the different cutters carried in the spider 121 is adapted for cutting a different notch or form of notch in the key blank 141. For example,

as is illustratedin Figures 17 and 22, a cutter such employed to trim and square oil' the ends of the bit 145 of the key blank. Referring to Figures 27-29, a cutter such as the cutter 123, or one having a wider or narrower face as may be required, is' employed to cut in the bit 145 of the key blank notches correspond ing to the notches 147 a inthe bit 147 of the guide key. In order to cut the notches in the key blank corresponding to the notches 147 b of the guide key, a cutter such as the cutter 124 is employed (illustrated 4in Figure 14) This cutter has side cutting flanges 124@ and 1241 for cutting in a direction substantially parallel to the axis of rotation of.

the cutter. For each typeof cutter which is mounted in the spider 121, there is required a corresponding gage or guide to coact with the guide key or master key. `For example, in Figure 27 there is shown a guide 240 which coact's with the guide key 144 when the cutresponding to one of the notches 147a, for example, the carriage136 is moved along its supporting rod. 139 until the guide 240 is positioned opposite the notchof the master key which it is desiredto reproduce in the key blank 141. Thereupon,

swung inwardly about its support 139, carrythe cutters carried in the a's thecutter 123=may be ,rection, as viewed in Figure In cutting a notch corthe carriage is' l ing theY bit 145 of. the key blank into engagement with the cutter 123, and this movement Figure v14) is employed, corresponding in shape to the cutter 124. The carriage is swung inwardly until the notch 147 b of the master key comes into registry with the guide 241 and thereupon the carriage 'is moved lengthwise of its support to start the cutting action of portion 124@ of the cutter until the guide 241 strikes the base. of the notch, whence cutting ceases. It will thus be seen that a variety of forms of guides is' required for cooperation with themasterfkey.

Referring now to Figure 18, these guides for cooperating with the master key 144 are mounted upon a rotatable member 242 adjacent to the supporting device 142 so that they may be brought one at a time into position to cooperate with the master key 144. The rotatable member 242 preferably takes the form of'a` disk of substantial axial thickness, and the gages or guide members are removably secured to the periphery of this disk by means v,of screws such as 243, the periphery of the disk being notched as shown in Figure 24,

a notch such as 147 b to receive and' firmly hold the guide members.

The disk 242.is rotatably mounted upon a spindle 244 (Figures 18 and 23) which is carried in lthe upper end of` a bracket 245. This bracket 245 is pivoted'at its lower end 'in a lug 246 and by 'means of a pivot pin 247. A spring 248 urges the. brac et 245 to swing about the pin 247 in a counter-clockwise di- 18, and the brackethas a forwardly projecting arm 249 which limits this' swin ing movement as will be dev scribed hereina ter.

- The rotatable disk 242 carrying upon its peri hery the various the periphery Yof the disk, in addition to the notches 2420 for receiving the guides, lare a plurality of equally spaced notches 250. There is provided a notch 250 diametrically opposite each of the vguide members. coacting with the notchesv 250 thereis provided a lever 251 which is pivoted in the bracket 245 at 252-, as' shown in -Figure 23, and which is yieldingly held in the position shown in the drawin by a spring 253. This lever 251 locks the disk 242 in the position to which it may be turned about its spindle 244. -In the position shown in Fi res 23 and 24, the guide 240 has been brougii into operative relation to themasterke 144, and the locking lever 251 thus rests 1n the slot 250 which is diametrically opposite the guide 240. In order to bring another .of the guides position to ooact with the master key, the lock 251 is released by simply swinging it outguide members such as. 240, is shown clearly in Figures 23 and 24.- Inv For L into wardly away from the periphery of the disk, the disk is turned to bring the desired guide into the position now occupied by the guide 240 and thereupon the lever 251 is permitted to snap into the notch to lock the disk against further turning. v

This mounting of the various gages, as just described, is distinctly advantageous. When t-he spider 121 is turned to bring a new'cutting tool into position to operate upon the key blank, the appropriate guide may be brought into position and locked to coact with the master key with the greatest convenience. The operator is not required to remove parts from the machine and replace them with other parts, nor to loosen and tighten nuts or screws, all of which consumes valuable time. The guides carried by the disk 242 are removable and replaceable by other guides if it is found necessary to suit requirements of practice or to change the cutting tools carried by the spider 121. 4

Referring to Figures 18 and 21, the spring 248 tends to swing the bracket 245, which carries the gages, outwardly or forwardly toward the clamping device 142 for the master key. The front end of the arm 249 projects beneath an overhanging part 254e of a bracket 254 which projects upwardly from the base 20. This bracket 254 with the parts associated therewith, coacting with the arm 249, limit the swinging movement of the bracket 245 about its pivot 247.

A11 adjustable set screw 255 in the overhanging part 254a limits the swinging movement of the bracket 245 inwardly. ln the upright 254 is rotatably mounted. a pin 256 (Figures 19 and 20), the inner end of which carries a cam 257 and the outer end of which is provided with a thumb lever 258 by means of which the pin 256 and the cam 257 may be turned. ln 19 the pin 256 is turned so that the low part of the cam 257 faces the end portion of the arm 249, and in Fi re 2O the pin 256 is turned so that the high portion of the cam faces the arm 249. In the position shown in Figure 19, and also in Fi res 18 and 21, the arm 249 is ermitted a egree of clearance determinedp by the adjustmentof the set screw 255, thereb permitting a limited rotation of thebracket 245 about its pivot 247. The spring 248 normally holds the parts in the position shown in Figure 21. ln the position of the parts shown in Figure 20, the arm 249 is tightly clamped between'the set screw 255 and the cam 257 so that the bracket 245 is locked in osition against any swinging movement agout its pivot 247.

The cam 257 is turned to the position shown in Figures 18, 19 and 21, by means of the thumb lever 258, when the machine is being employed to cut notches, such as the notches 147e figure 27), or to trim o and square the en of the bit of the key blank.

the position shown in Figure strikes the key blank.

The carriage 136 normally rests in the posiits support 139 so that the y by the spring 248 in the position shown in* Figure 21. The use of the apparatus in cutting a notch such as one of the notches 147a is now as is illustrated in Figures 27, 28 and 29. The carriage 136 is moved along its support 139 until .the notch which it is desired to reproduce in the key blank 141 comes opposite the guide such as the guide 240, it being now understood that ide 240 has been appropriately selected rom the various guides carried by the rotatable member 242. The carriage is then swung inwardly, carrying the master key toward the ide and carrying the key blank toward t e cutter. At this point it is highly desirable that the notch of the guide key which is to be reproduced may be engaged with the guide before the key blank comes into engagement with the cutter. This is permitted by the clearance allowed by the low part of the cam 257 for permitting the bracket 245 to swing about its pivot. The forward movement of the gage permitted by this clearance brings the gage to such position that it may be en aged with the notch which is to be reprouced, before the key blank comes into contact with the cutter. This is illustrated in Figure 28 wherein the guide 240 has entered the notch in the guide key and the bit of the key blank 141 has not touched the cutter 123. This prevents marring the edge of the key blank and avoids the possibility of cutting at 'the wrong place or before the gauge has accurately positioned the carriage along the shaft 139.

After the carriage has been moved inwardly until the parts are broughtto a position approximating thatshown in Figure 28, further inward movement swings the bracket 245 about its pivot 247 until the arm 249 comes against the set screw 255, the cutting of the notch in the key blank taking place during this latter movement as is illustrated in Figure 29.

This preliminaryll feel as it may be termed is a feature of real practical value. The carriage may be adjusted into the proper position for accurate cutting with the greatest convenienceand without danger of marring or spoiling the key blank by the cutter striking it at the wrong point. rlhe guide may be actually registered with the notch desired to be reproduced before the cutter Greater accuracy is achieved and with a saving of time.

ln cutting notches such as the notches 147 6 (Figure 14) by means of a cutter such as the cutter 124, the appropriate guide, namely, guide 241, is selected by rotation of member 242, for coaction with the cutter 124, but

this feature of permitting the ide to swing A forwardly is not employed. hen cutting this type of notch the guide islixed in position. This is accomplished with the greatest convenience by simply swinging thecatn 257 through 180 to the position shownl in Figure 20, by means of the thumb lever 258.

' By way of illustration I have shown in Figure 24 other possible forms of guides at 281 and' 282, eachadalpted for coaction with a' dierent cutter. nd by reference to Figure 24 it will be seen that I have illustratively j. shown the guides 281, 282 and 240 of differconstruction and are so mounted that, of the ent thicknesses as illustrative of guides whichmay be selectively positioned for coaction with cutters of respectively similar thicknesses. c

The clamping` devices 122 and 142 are :adapted rfor hol-ding various types of keys and the cutters carried by the spider 121 are adapted for operating 'upon various types of keys in addition to keys of the barrel type,

the cutting of which has ,just been described;

For example, this apparatus may be employed to cut Hat keys such as shownin Figure 15. In'this `ligurethere is shown a master key 260 cooperating with the guide 240 and a key blank 261 being operated upon by the cutter 123.. The twol clamping devices 122 and 142 are preferably substantially alike so that one only need be described in detail. Moreover, the clamping devices are of such various jawy members provided thereby for gripping different styles or types of keys,

4any one pair of jaw members may be selecwhich it grips to a tively positioned to present the styleof key selectively positioned tool of the various cutting tools provided. i

Referring to Figure 22, the clamping device 122 is seen to comprise two clamping members 161 and 162 through which passes a thread-ed post 163 which is secured in the carriage'136 and projects upwardly therefrom.

This post 163 is provided with a -wing nut 164 which is threaded down ,along the post lagainst the member 162 to grip the key between the clamping members. For different kinds and shapes of keys dil'erent clamping arrangements are desirable and for this reason the clamping device has four sides, any one` of which may be brought into position to 'face the cutters and hold the key to be operated upon.

l key is being operated upon by ection 167 `withthe groove either`the side 1 or the side 3 may be brought toface the cutter, and by registering the projection 167 with the groove 166, either the side 2 or the side 4 maybe brought to face the cutter.

'Each one -of these sides provides a different clamping device. The clamping type of 161 and162 are preferably intermembers tted as by a projection 168 and groove 169,'

so that they are properly positioned with respect to one another whenplaced together and are properly guided when the member 162 is moved to and from clamping position by the thumb nut. Referring to xFigure 25, it will be seen that the centrally projecting member 168 is cut away or recessedasat 161e. and 161e so that when either side 2 or 4 -is brought to face the cutter these recesses can accommodate portions of the key or keyblank that may be clamped between the members. 161 and 162 and positioned therebetween in a direction transversely of the projecting lmember 168.

' When keys of tlie barrel type areIbeng cut,

foi:l example as shown in Figures 14 and 17, the cylindrical end portion which Y the bit projects is clamped in the clamping device to position the bit for operation thereon by the cutters. In orderto more securely clamp this cylindrical part of the key, referring. to Figure` 25the clamping surfaces 161a and 162a,1w hich are adapted for 'clamping barrel keys, are preferably made inclined, the lower surface 161a sloping downwardly from its outer edge and the u pper surface 162a sloping upwardly from its outer edge. When the cylindrical key portion is clamped between these two clamping surfaces they tend to draw the key in against the body of the clamping device so that the cylindrical key portion is `gripped at three spaced points about its surface, as maybe seen from Figure 22, and a firm gripping action is had.

l As shown in Figure 25, thesurfaces 161m and 162a areroughened preferably by corrugations or teeth extending longitudinally thereof. When the cylindrical key portionis clamped these corrugations or projecting teeth bite into the surface ofthe key and securely grip the key against possibility ofv its turning about its longitudinal axis as it is operated upon by the cutters. This is of particulary importance when the bit of the a cutter such as the cutter 124, as shown in igure 14. Thi cutter exerts a strong tendency to turn the key .about its longitudinal axis, and if such turning occurs while the cutter is operating, as shown in Figure 14, there is agrave danger of breaking off the portion 124a-of the cutting tool. vThe teeth on the clamping surfaces 1llai and 162a firmly grippingthe cylindrical under the severe torsional forc exerted by portion, prevent any turningof the key y `the cutter 124 and thus do away with the danger of ruining the cutter and other injury to the machine.

Referring again to Figure 25, the clampg surfaces 161?) and 1626 are also preferzliibly roughened by longitudinally extending corrugations or teeth. These clamping surfaces 1616 and 162?) are adapted for clampperhaps ing a fiat key as shown in Figure 16, and the roughened surfaces, biting into the key surface, independently hold such a key against any twisting force exerted thereon by the cutters.

From the foregoing, it will be seen that there is herein provided a machine which achievesthe objects of this invention and accomplishes many advantages of practical importance. The machine is capable of operating with rapidity and accuracy and, furthermore, it is adapted for cutting substantially all kinds of keys. Adjustments of the ma-M` chine for taking di'erent kinds of cuts or for arranging the parts to act upon different types of keys, are accomplished with the greatest convenience and Without loss of time.

As many possible embodiments may be made of the above invention, and as many changes might be made in the embodiment above set forth, it is to be understood that all matter hereinbefore set forth or shown in the accompanying drawings, is to be interpreted as illustrative and not in a limiting sense.

I claim as my invention:

1. In apparatus of the class described, in combination, a movable support, means upon said support adapted to hold a key blank, means upon said support adapted to hold a master key, cutting means adapted to operate upon said key blank, a plurality of guides any one of which is adapted to coact with said master key to control a cutting operation of saidvcutting means upon a key blank, and movable means mounting said guides to enable them to be brought one at a time into operative relation to said master key.

2. In apparatus of the class described, in combination, a movable support, means upon said support adapted to hold a key blank, means upon said support adapted to hold a master key, cutting means adapted to operate upon said key blank, and a device adjacent to said holding means for said master key adapted to carry a plurality of guides, said device being rotatable to position any one of the guides carried thereby in operative relation to said master key.

3. In apparatus of the class described, in combination, a movable support, means upon said support adapted to hold a key blank, means upon said support adapted to hold a master key, cutting means adapted to operate upon said key blank, and a device adjacent to said holding means for said master key having mounted thereon a plurality of guides,

any one of which is adapted to coact with saidqnaster key to control a cutting operation of said cutting means upon a key blank, said device being movable to position any one of said guides in operative relationfto said master key, and means removably mounting said guides upon said device. i

4. In apparatus of the classdescribed, in combination, amovable support, means upon said support adapted to hold a key blank, means uponsaid support adapted to hold a master key, cutting means-adapted to operate upon said key blank, a rotatable disk mounted adjacent to said holding means for said master key, and a plurality of guides mounted upon the periphery of said disk and adapted to be brought by rotation of said disk one at a time into operative relation to said inaster key.

5. In apparatus of the class described, in combination, aA movable support, means upon said 'support adapted to hold a key blank, means upon said support adapted to hold a master key, cutting means adapted to operate upon said kcy blank, a rotatable disk mounted adjacent to said holding means for said master key, a plurality of spaced 4recesses in the periphery of said disk, and a plurality of guides removably held in said respective recesses, said guides being adapted to be brought by rotation of said disk one at a time into operative relation to said master key.

6. In apparatus of the class described, in combination, a movable support, means o`n said support adapted to hold a key blank, means upon said support adapted to4 hold a master key, a plurality of cutting tools, means mounting said cutting tools to enable them to be brought one at a time into operative relation to said key blank, a plurality of guides, each of which is adapted to control the cutting action of one of said cutting tools,-

combination, a movable support, means on said support adapted to hold a key blank, means upon said support adapted to hold a master key, a plurality of cutting tools, a

rotatable device upon which said cuttinO .I

tools are mounted and adapted to be rotated to bring said tools one at a time into operative relation to said key blank, a plurality of guides, and a rotatable device upon which said guides are mounted adapted to be rotated to bring said guides one at a time into operative relation to said master key.

8. In apparatus of the class described, in combination, a'movable support, means upon said support means upon said support adapted to hold a master key, cutting means adapted to operate upon said key blank, a plurality of guides any one of which is adapted to coact with said master key to control a cutting operation member moving in a path substantially paralof said cutting means on a key blank, means lel to that of said carriage and a driving mounting saidguides to enable them to be connection between said mem efr-and said carbrought, one at a time into operative relation riage comprising a device mounted upon said 5 to said master key, and means mounting said carriage and adapted to-engage a part of said 70 last means for movement of limited magnimember, said device bein movably mounted tude toward and away from said support. upon said carriage and adapted to be drawn 9. In apparatus of the class described, in out ofY engagement with said member to percombination, a movable support, means upon mit manual movement of said carriage.

said support adapted to hold a key blank, 13. In apparatus of the class described, in 75 means upon said support adapted to hold a combination, a cutting tool, a carriage havmaster key, cutting means adapted to operate ing means adapted to hold a key blank for upon said key blank, a rotatable disk mountoperation thereon by said tool, means mounte adjacent to said holding means for said ing said carriage for movement back and master key, a plurality of guides mounted forth past said tool, a driven member mov- 80 upon the periphery of said disk and adapted ing in a path substantially parallel to that to be brought by rotation of said disk one at of said carriage, a spring connected to said a time into operative relation to said master member and urging said carriage toward said key', and means mounting said disk forv movetool, and a device upon said carriage for conment of limited magnitude toward and away necting said carriage toA be driven by said 85 from said support. member, said spring and said device being 10. In apparatus of the class describedin detachable from said member to permit sald combination, a cutting tool, a carriage having carriage to be moved past said tool manually means adapted to hold a key blank tor operand independently of said member.

ation thereon 'by said tool, means mounting 14. In apparatusof the class described, 1n said carriage for movement back andy forth combination, a cutting tool, acarriage having pa'st said tool, means for causing relative. means adapted to hold a keyblank vfor opermovement between sald cutting tool and said ation thereon by said tool, means mounting carriage in a direction to cause said tool to said carriage for movement past said tool, cut a key contour inisaid key blank, means means for causing relative movementbetween 95 from which said carriage is adapted to be said cutting tool and said carriage in adirecdriven, a disruptable driving connection be tion to cause said tool to cut a key contour 1n tween said carriage and said last means, and said key blank driving means, a clutch for vmeans for disrupting and maintaining disconnecting said driving means to drive sald rupted said driving connection, said mountcarriage, spring means tending to disengage ing means being constructed so that said said clutch, a latch for holding said clutch carriage may be moved and manipulated in positionof engagement, and means adaptmanually for cutting a key contour. Kd upon predetermined movement of sald 11. In apparatus of the class described, in arriage to'release said latch. 40`combination,acutting tool,acarriage having 15. In apparatus of the class described, means adapted to hold a key-blank for operin combination, a cutting. tool, a carriage ation thereon by said tool, means mounting having means adapted to hold a key blank fork said carriage for movement back and forth operation thereon by said tool, means mountpast said tool, means for causing relative ing said carriage formovement past said movement between said cutting tool and said tool, means adapted to drive saidcarrlage no carriage in a direction to cause said tool to past said tool and back to its original posicut a key contour in said key blank, a driven i tion, a clutch through which said last means member moving in apath substantially paralis driven, spring means tending to disen age lel to that of said carriage, a driving consaidvclutch, a latch mechanism for hol ing 5 nection between said member and said car`- said clutch in position of engagement, means riage adapted to be disconnected, and means adapted upon predetermined movement of for disconnecting and holding disconnected said carriage to release said latch, and means said driving connection, said mounting adapted thereupon to hold said clutch in enf means being constructed to permit said cargagement until said carriage has returned t0 55 riage to be moved and manipulatedmanually its initial position. 12

for cutting a key contour. 16. In apparatus of the class described,in

12. In apparatus of the class described, in combination, a cutting tool, a carriage having combination, a cutting tool, a carriage having means adapted to hold a key blank for opermeans adapted to hold a key blank for opation thereon by said tool, means mounting 'l no eration thereon by said tool, means mounting said carriage :for movement past said tool,

said carriage for movement back and forth means adapted to drive said carriage past past said tool, means Ifor causing relative said tool a predetermined distance in one dimovement between said cutting tool'and said rection and then return said carriage to its carriage in a direction to cause said tool to initial position, a clutch through which said 5 cut a key contour in said key blank, a driven last means is driven, spring means tending to 130, 

